Feeding mechanism



April 8, 1930. R. T. BANKS 1,754,159

FEEDING MECHANI SM Filed Jan. 7, 1921 Patented Apr. 8, 1930 UNITED STATES rarsnr caries ROBERT T. BANKS, OF SPOKANE, WASHINGTON, ASSIGNOR TO SULLIVAN MACHINERY COMPANY, A CORPORATION OF MASSACHUSETTS FEEDING MECHANISM Application. led January 7, 1921.

My invention relates to feeding mechanisms, and more especially to feeding mechanisms adapted for feeding stoping rock drills.

An object of my invention is to provide an improved feeding mechanism. Another ob- ]ect of my invention is to provide an improved feeding mechanism for use on rock drilling devices of the class known as stopers. A further object of my invention is to provide an improved controlling mechanism for feeding devices for stoping drills. Other objects of my invention will hereinafter appear.

1n the accompanying drawings, I have shown for purposes of illustration an illustrative embodiment of my mechanism incorporated in a stoping drill.

ln these drawings,-

Fig. 1 is a front elevation of the feed mechanism and rear end of the motor cylinder of a drill of the type mentioned, a portion of the control mechanism being broken away to permit fuller illustration.

Fig. 2 is a longitudinal central section substantially on the line 2 2 of Fig. 1.

Fig. 3 is a section on the line 3--3 of Fig. 1 through the manual control means.

1n these drawings, the feed cylinder of a stoping drill is indicated at 1, this feed cylinder being rigidly attached, as indicated, by the nuts at 2 to the cylinder 3 of a pneumatic drill. The supply of air to the feed cylinder and also to the motor cylinder is conducted by way of a connection 4L with a valve casing 5 in which a suitably ported valve is arranged as indicated at 6, this valve being adapted for manual rotation by means of a handle 7. Under the control of this valve, air is admitted from a central chamber 8 by Lway of a port 9 to a chamber 1() from which fluid is distributed to the ports of the motor. Likewise by way of a port 11 fluid may be admitted to a passage 12 extending substantially diametrically across the rear head 13 of the motor and from there, as will later be described, to the feed cylinder. The feed cylinder 1 is provided with a rear head 14 by which the piston rod 15 is guidedwhen duid is admitted to the forward end of the feed cylinder to act upon the piston 16. A blow off vent 17 is arranged adjacent the rear end of the feed cylinder Serial No. 435,764.

to permit breathing of the cylinder and to serve as a tell tale. A port 11 is provided to connect a direct connection 12 with the rear end of the cylinder to the atmosphere when it is desired to permit collapse of the ing portion 19 turned at right angles to the i main portion of the handle and arranged parallel to the drill as a whole. The'drill runner grasps the handle 19 and in the case of a hand rotation stoper os'cillates the drill as a whole, thereby greatly facilitating the operation of the .steel upon the bottom of the hole. A similar handle is also used in the case of automatic rotation tools in which case it frequently becomes necessary, where the drilling is heavy and the steel tends to stick, to hold the tool from rotation should the steel sticlr. l have combined in the present device with this hand lever, mechanism for permit-- ting` instantaneous control of the operation of the feed cylinder. As will be noted in Figs. 1 and 2, fluid pressure transmitted through aassage 12 enters a port 2O extending longitudinally through the handle 18 and is con# rolled by a valve 21 through a groove 22 in which, in one position of the valve, it passes to a port 23 which communicates with a port 24- opening into the forward end of the feed cylinder. At will be obvious that when air is admitted to 'the passage 12, it will be transmitted by way of passage 20, through the groove 22 in the valve', and thence by passages 23 and 24C to the fee-d cylinder and acting in the forward end of the cylinder will cause the drill to be fed up to the work. A handle 25 is provided in the valve 21, and a spring rate of feed may be controlled either' by means of the valve 6Y or by supplemental valve 21. In the preferred method of operation, the valve 2l is employed to control the feed while the valve 6 is used primarily for varying the operation of the motor. The valve 21 is alternately opened and closed at small intervals as may be necessary to check the feed as desired and by reason of the fact that .thereis a continuous leakage of air past the piston, it will be obvious that .the alternate cracking and closing of the valve 2l will permit the feed to be controlled in such manner as to enable checking of the feed almost instantly by merely allowing thev valve 2l to remain closed. It will thus be obvious vthat a ,dual control of the operation ofthe feed. .cylinder is provided and that very yconveniently located and instantly op- `aable means for controlling the feeding action without change of setting of the throttle valve is likewise provided.

lVhile I have in vthis application specifically described one form which my invention may assume in practice, it will be understood .that this form of the same is shown for purposes of illustration and that the invention may be modified and embodied in other forms without departing from its spirit or the scopeof the appended claims.

What I claim as new and desire to secure by ,Letters Patent is: i

l.V In ya rock drill, the combination with a fluid actuated drilling motor, a pressure fluid actuated feeding device therefor comprising relatively movable cylinder and piston elements, a 'throttle valve controlling fluid supply to the drilling motor, and a rotation handle projecting laterally from one side of the drill and having agrasping portion at its outer extremity, ofv feed controlling meansgcomprising ports and passages permitting the passage of pressure fluid to said handle and communicating with said feed cylinder element, and a valve carried by said handle nearer the outer end of the latter than the point of supply of pressure fluid to said hande and operable from said grasping portion for enabling the operator to control the flow of pressure fluid through said handle to said feeding device in accordance with the requirements of the work while the throttle valve'remains in a single position of adjustment.`

2. In a rock drill, the combination with a fluid actuated drilling motor, a pressure fluid actuated feeding device therefor comprising relatively movable cylinder and pistion elements, a main throttlevalve for controlling fluid flow to said motor and feeding device, and a rotation handle projecting laterally from one side of the, drill and having a grasping portion at its outer extremity, of feed controlling means comprisingports and passages permitting the passage of pressure fluid from said main throttle valve through said handle and communicating with said feed cylinder element, and a valve carried by said handle and operable from said grasping portion for enabling the operator to control the flow .of pressure fluid from said throttle valve through said handle to said feeding device in accordance with the requirements of the Work.

In combination, in a rock Adrilling mechanism, ahead block having at one side thereof a drilling motor and at the other side thereof a feeding mechanism of the expansible chamber type, a rotation handle projecting laterally from said block and having a plurality V,of passages therein, one extending outwardly and another extending inwardly therethrough, the inwardly extending passage having communication with the feeding mechanism and constituting a fluid supply connection therefor, la fluid supply connection on said block for connection with a source .of pressure fluid, and a valve at the outer end ofsaid handle for controlling communication between said passages, said first mentioned passage constituting means for supplying pressure fluid from said fluid supply vconnection to said valve.

4,. In arock drilling mechanism, the combination with a drilling motor, of a pressure fluid actuated feeding device ntherefor comprising relatively movable cylinder and piston .elements .cooperating to form an expansible chamber to which pressure fluid may be admitted to effect feeding upon increase in volumeof said chamber, a rotation handle -extending laterally from said mechanism,

a .pressure fluid supply connection for the drilling motor and feeding device, said rotation handle having therein a passage through which pressure fluid may be supplied to the expansible chamber, and a passage through which pressure fluid may be supplied from the supply to said first mentioned passage, and means for controlling said mechanism including a throttle valve controlling the drilling motor, and independently adjustable valve means supported by saidrotation handle controllable to effect connection between the passages in the handle to causeV feeding or to interrupt connection between said passages.

5. In combination, ina drilling mechanism of the type which comprises a drilling motor and an expansible chamber pressure fluid operated feeding mechanism therefor, relatively reciprocable cylinder and piston elements cooperating to form an expansible chamber to which pressure fluid may be admitted to effect feeding movement of one of said elements, avrotation handle secured to one of saidelernents, a pairof passages extending through said handle, a fluidy supply connection, one of said passages receiving fluid therefrom and extending outwardly through icc said handle, the other of said passages eX- tending inwardly and having connection at its inner end with said eXpansible chamber, and valve mechanism at the outer end of said handle for connecting said passages at will.

6. In combination, in a drilling mechanism of the type which comprises a drilling motor and an expansible chamber pressure fluid operated feeding mechanism therefor, relatively reciprocable cylinder and piston elements cooperating to form an cirpansiblc chamber to which pressure fluid may be admitted to effect feeding movement of one of said elements, a rotation handle secured to one of said elements, a pair of passages extending through said handle, a iiuid supply connection, one of said passages receiving fluid therefrom and extending outwardly through said handle, the other of said passages eirtending inwardly and having connection at its inner end with said eXpansible chamber, and valve mechanism operable from the outer end of said handle for connecting said passages at will. i

7. ln combination, in a drilling mechanism of the type which comprises a drilling motor and an eXpansible chamber pressure fluid operated feeding mechanism therefor, relatively reciprocable cylinder and piston elements cooperating to form an expansible chamber to which pressure fluid may be admitted to effect feeding movement of one of said elements, a rotation handle secured to one of said elements, a pair of passages extending 'i through said handle, a fluid supply connection, one of said passages receiving fluid therefrom and extending outwardly through said handle, the other of said passages extending inwardly and having connection at its inner end with said expansible chamber, and a rotatable valve movable to connect said passages and controllable by the hand of an operator at the outer end of said handle.

8. ln a rock drilling mechanism, the com-- bination with a drilling motor, of a pressure fluid actuated feeding device therefor comprising relatively movable cylinder and pis ton elements cooperating to form an eXpansible chamber to which pressure fluid may be admitted to effect feeding upon increase in volume of said chamber', a rotation handle extending laterally from the mechanism, a pressure fluid supply connection, a valve supported on said rotation handle at a point more remote than said pressure liuid supply con nection from the anis of the drill and controlling communication between the pressure fluid supply connection and said eXpansible chamber, and controlling means for said valve providing a manual grasping portion disposed adjacent the outer extremity of said rotation handle and movable to effect control of the feed.

9. ln combination, in a rock drilling mechanism, a head block having at one side thereof a drilling motor and at the other side thereof a feeding mechanism of the eXpansible chamber type, a rotation handle fixed to said block and projecting laterally from said mechanism and having a plurality of passages therein, one extending outwardly and another extending inwardly therethrough, the inwardly eX- tendin-O' passage having communication with the feeding mechanism and constituting a fluid supply connection therefor, a duid supply connection on said block for connection with source of pressure fluid, and a valve at the outer end of said handle for controlling communication between said passages, said first mentioned passage Lconstituting means for supplying pressure fluid from said fluid supply connection to said valve.

l0. The combination with a stoper rock drill having a pressure fluid hammer motor for actuating the drill steel, pressure fluid actuated feeding means, a throttle valve for controlling said hammer motor, a passage for supplying pressure Huid to said feeding` means, and a rotation handle projecting laterally from the drill a substantial distance to obtain leverage and having a grasping portion at its outer extremity, of control means for regulating the flow of pressure fluid through said supply passage to said feeding means including a control element located at 9 the outer extremity of said handle adjacent said grasping portion whereby the operator may grasp said handle and control said feed means by but a single, hand.

l1. The combination with a stoper rock drill having a pressure fluid hammer motor for actuating the drill steel, pressure fluid actuated feeding means, a throttle valve for controlling said motor, a passage for supplying pressure fluid to said feeding means, and a rotation handle projecting laterally from the drill a substantial distance to obtain leverage and having a grasping portion at its outer eX- tremity, of control means for regulating the dow of pressure fluid through said supply passage to said feeding means including a fluid passage extending through said handle to a point adjacent the outer extremity of said handle adjacent said grasping portion thereon and closable, under operator control, to effect control of the feed whereby the operator may grasp said handle and control the feed by but a single hand.

ln testimony whereof l a'hir: my signature.

nosnnr Tinnitus. 

